                    (c/add-items [{:id 1 :name "bananas" :category "Long fruit"}
                                  {:id 2 :name "grapes" :category "Small round fruit"}
                                  {:id 3 :name "tomatoes" :category "Pretend fruit"}]))]
-    (c/diff source target) => {:add
-                               #{{:id 5, :name "blueberries", :category "Blue fruit"}
-                                 {:id 4, :name "strawberries", :category "Red fruit"}},
-                               :modify
-                               #{{:source {:id 2, :name "grapes", :category "New fruit"},
-                                  :target {:id 2, :name "grapes", :category "Small round fruit"}}
-                                 {:source {:id 1, :name "bananas", :category "Old fruit"},
-                                  :target {:id 1, :name "bananas", :category "Long fruit"}}},
-                               :remove #{{:id 3, :name "tomatoes", :category "Pretend fruit"}}}
+    (c/diff source target) =>
+
+    {:add
+     #{{:id 5, :name "blueberries", :category "Blue fruit"}
+       {:id 4, :name "strawberries", :category "Red fruit"}},
+     :modify
+     #{{:source {:id 2, :name "grapes", :category "New fruit"},
+        :target {:id 2, :name "grapes", :category "Small round fruit"}}
+       {:source {:id 1, :name "bananas", :category "Old fruit"},
+        :target {:id 1, :name "bananas", :category "Long fruit"}}},
+     :remove #{{:id 3, :name "tomatoes", :category "Pretend fruit"}}}
 
     (c/apply-diff target {:add
                           #{{:id 5, :name "blueberries", :category "Blue fruit"}

     :quantity 4}})


[[:chapter {:title "Miscellaneous addenda"}]]

[[:section {:title "Diffing"}]]


                             :target {:id 2, :name "grapes", :category "Small round fruit"}}
                            {:source {:id 1, :name "bananas", :category "Old fruit"},
                             :target {:id 1, :name "bananas", :category "Long fruit"}}},
                          :remove #{{:id 3, :name "tomatoes", :category "Pretend fruit"}}}) =>
    source))


(comment
